Chicago Braces for DNC with Unveiled Security Measures

Officials reveal extensive security plans and street closures as city prepares for historic convention.

Security perimeters will be established around United Center and McCormick Place, impacting local traffic and access.
Over 500 officers from outside Chicago will assist with security, focusing on maintaining order and protecting demonstrators' rights.
Chicago Police Superintendent Larry Snelling assures that city neighborhoods will not be neglected during the convention.
Federal officials emphasize the heightened threat environment but report no specific threats to the event.
Protest groups negotiate for closer demonstration sites, with significant turnout expected.